Objective To observe the liver protection of Ginsenoside Rg1 and Oxymatrine and research its mechanisms.Methods Nonalcoholic fatty liver disease(NAFLD) model was induced by high-fat diet and hepatic fibrosis(HF) model was caused by CCl4 in rats. Protection effects of Ginsenoside Rg1, Oxymatrine and the combination were obsrved.ResultsBoth Rg1 and OMT significantly reduced serum total cholesterol(TC), triglyceride(TG), alanine aminotransferase(ALT) and aspartate amino transferase (AST) levels of NAFLD rats[Rg1 group (2.76±0.22) mmol/L,(1.24±0.17) mmol/L,(112.39±12.91)U/L, (195.16±12.99) U/L; OMT group (2.35±0.19) mmol/L,(1.09±0.09) mmol/L,(90.57±10.25) U/L, (186.45±13.14) U/L,P<0.05 or 0.01],elevated liver PPARα mRNA and PPARγ mRNA[Rg1 group: (0.64± 0.05),(0.77±0.07);OMT group(0.67±0.07),(0.73±0.06),P<0.05 or 0.01] and alleviated the degree of fatty liver. The effects of the combination group[(1.87±0.21) mmol/L, (0.77±0.10) mmol/L,(58.78± 8.87)U/L,(149.78±11.27)U/L,(0.81±0.09),(0.89±0.05) ] was better than single treatment group (P<0.05 or 0.01). Both Rg1 and OMT significantly reduced the serum ALT, AST levels and liver methane dicarboxylic aldehyde(MDA)content[Rg1 group: (46.75±5.11) U/L,(147.53±7.31) U/L,(5.54±1.06) nmol/g; OMT group:(148.24±4.32) U/L, (93.90±14.22) U/L,(5.85±0.91) nmol/g,P<0.01] in HF model[Rg1 group: (146.75±5.11) U/L,(147.53±7.31)U/L,(5.54±1.06)nmol/g; OMT group:(148.24±4.32) U/L,(93.90±14.22) U/L,(5.85±0.91) nmol/g,P<0.01], enhanced liver SOD activity[Rg1 group:(91.61±9.26) U/mg prot; OM group: (86.19±8.51) U/mg prot,P<0.01] and reduced the semi-quantitative score [Rg1 group:(2.7±0.4); OMT group:(2.9±0.5),P<0.05 or 0.01], the effect of the combination group[(92.21±4.36) U/L,(52.08±7.56) U/L,(3.68±0.54) nmol/g,(99.67±13.13) U/mg prot, (1.2±0.4)] was better than single treatment group.Conclusion Ginsenoside Rg1 and Oxymatrine had synergic of liver protection and the synergic regulation of liver PPARα, PPARγ and antioxidant effect, which should be the potential mechanisms.

AIM:To compare the effects of different histogram enhancement algorithms on improving the quality of MRI image.METHODS:Three processing algorithms,including histogram equalization,adaptive histogram equalization and histogram specification,were applied to enhance a MRI cervical spine T2-weighted image based on programming software interactive data language.The capability of representation of details in dark area and the level of noise were evaluated by means of peak signal to noise ratio and image information entropy.RESULTS:Histogram equalization cannot enhance the details in dark region obviously,but decline the contrast of whole image;adaptive histogram equalization can improve details but enlarge noise and engender shadow at edges simultaneously;histogram specification can choose the type of histogram function to match;it reveals the details in dark area sufficiently,and there is the lowest level of noise among these three algorithms.CONCLUSION:MRI cervical spine T2-weighted image processing with different algorithms of histogram enhancement,histogram specification is more outstanding than histogram equalization and adaptive histogram equalization in the representation of details and the low-level of noise.

Coronary Artery Disease ; rehabilitation ; Exercise Therapy ; Humans

OBJECTIVE: To analyze recent developments in image texture research both from methodology and from medical image analysis. DATA SOURCE: With the key words of "medical image, texture research, image analysis, application", we retrieved PubMed database (http://www.ncbi.nlm.nih.gov/sites/entrez/), ScienceDirecr database (http://www.sciencedirect.com/) from 1983 to 2009 and CNKI database (http://www.cnki.net/) from 2004 to 2009. DATA SELECTION: Original research thesis, and reviews with clear opinion, sufficient data and reliable conclusion were included. Repetitive studies and studies concerning unrelated to the objective were excluded. MAIN OUTCOME MEASURES: A total 104 literatures were selected, including 10 Chinese literatures and 94 English literatures. These literatures were primarily collected by reading titles and abstracts. A total of 33 literatures with unrelated objective, 18 literatures with repetitive studies were excluded. Finally, 53 Chinese and English literatures were included for further analysis. RESULTS: Primary methods used in texture analysis are structural, statistical, model-based and transform-based-method. When we are interested in identifying texture primitives and their distribution to analyze regular texture, structural approaches are suited. Characteristics of texture like smoothness and coarseness are well analyzed by statistical approaches. Model-based-method is based on the construction of an image model that can be used not only to describe texture, but also to synthesize it. Digital features of texture are got by using some signal processing theories in transformation domain. Texture applications have been widely used in medical imaging domain. CONCLUSION: Because of the specific and complication of medical image and texture, not all texture measure can be used for medical image analysis. One of the development directions of medical image texture research is how to integrate and educe advantages of different methods to fully extract texture features and exactly attribute medical image texture and the relation between its changes and pathological state, resulting in an important component of computer-aided diagnosis.

Objective To explore the role of T cell-mediated immunity in the pathogenesis of venous thromboembolism ( VTE ) by analyzing the differential expression of T cell immune-related gene mRNAs peripheral blood mononuclear cells (PBMCs) between VTE patients and controls with GeneChip Human Genome. Methods Human eDNA microarray analysis was employed in PBMCs from 20 VTE patients and 20 hypertensive controls,and random variant model (RVM) corrected t-test was used for statistical analysis of differential gene expression.Results Six mRNA stripes including CD247,CD3D,CD3G,Granzyme A (GzmA),Granzyme B (GzmB) and Zeta-chain-associated protein kinase 70 (ZAP70)were found to be associated with T cell-mediated immunity.Significant down-regulation of these six mRNAs was found in the VTE group compared with the controls ( 15.3050 ± 0.6346 vs 15.8053 ± 0.5567,13.7878 ±0.7731 vs 14.3820 ±0.4857,13.3299 ± 0.9104 vs 14.1246 ± 0.6011,14.8893 ± 0.8675 vs 15.5305 ±0.4624,15.9113 ±0.8123 vs 16.4553 ±0.5055,14.3652 ±0.7717 vs 14.3652 ±0.7717;all P values ＜ 0.05 ).Conclusions T cells' function including antigen recognition,signal transduction and cytotoxicity was impaired in VTE patients.T cell-mediated immunity dysfunction probably plays an important role in the pathogenesis of VTE.

Objectives To explore the intrinsic factors related to the pathogenesis of acute arterial thrombosis (AAT) and to elucidate the patho-genesis of AAT on the basis of differentially expressed genes. Methods Patients with acute myocardial infarction (AMI), stable angina (SA) and healthy controls (n=20 per group) were recruited, and the whole human genome microarray analysis was performed to detect the dif-ferentially expressed genes among these subjects. Results Patients with AMI had disease-specific gene expression pattern. Biological func-tional analysis showed the function of T cells was significantly reduced, the mitochondrial metabolism significantly decreased, the ion me-tabolism was abnormal, the cell apoptosis and inflammatory reaction increased, the phagocytosis elevated, the neutrophil-mediated immunity increased and the post-traumatic repair of cells and tissues increased in AMI patients. The biological function in SA group and healthy con-trols remained stable and was comparable. Conclusions The reduced function of T cell gene models in AAT showed the dysfunction of the immune system. The pathogenesis of AAT may be related to the inflammatory reaction after arterial intima infection caused by potential pathogenic microorganisms.

OBJECTIVE:To establish the method for the residues determination of 5 organic solvents in teicoplanin raw materi-al and injection. METHODS:Headspace GC was performed on the column with 6% cyanopropylphenyl-94% dimethyl polysiloxane (DB-624)as the stationary phase capillary column,the carrier gas was nitrogen,using the temperature program. The temperature of inlet was 200 ℃,detector was hydrogen flame ionization detector with the flow rate of 1 ml/min,split ratio was 40 ∶ 1 and the vol-ume was 1 ml. RESULTS:Good linearity of ethanol,acetone,ethyl acetate,tetrahydrofuran and triethylamine were obtained(r were 0.999 0-0.999 3);the average recoveries were respectively 95.6%,97.0%,103.2%,94.3%and 98.2%(RSD were 2.1%-4.9%, n=9);RSDs of precision and repeatability tests ≤2.6%;and the minimum detectable concentration were respectively 2,2,2,0.7 and 0.3 μg/ml. CONCLUSIONS:The established method is rapid,sensitive and accurate,and can be used for the residues determi-nation of organic solvents in teicoplanin raw materials and injection.

Objective:To implement rapid acquisition gradient echo(RAGE)pulse sequence in clinical MRI scaner.Methods:Pascal language is engaged to edit source code.Number of slice excited,order of phase encoded,phase recycle of RF pulse,NEX,on/off of the gradients,and so on are all controlled by sequence parameters.SI×N_(phase)×N_(slice) data of 32 bctys were allocated to restore the k space.Source code of sequence was compiled with executable file and is loaded to RINMR software.Image of human brain are acquired.The experiment has been conducted on 0.36T permanent MRI system.Resuits:In the case of 256×256 matrix acquisition,time of single slice is 4 seconds.The resolution and SNR of the image are all adquately satisfy the clinical application.

Objective To investigate the gene expression difference of IFN and their receptors in peripheral blood mononuclear cells (PBMC) of pulmonary embolism (PE) patients.Methods Twenty cases of PE patients and twenty sex and age matched controls were recruited into the study.Human cDNA microarray analysis was used to detect the gene expression difference of IFN associated genes between the two groups,and random variance model corrected t test was used to analyze the statistical data.Results In comparison with the control group, mRNA expression of type Ⅰ IFN, including IFNα5 mRNA,IFNα6 mRNA,IFNα8 mRNA,IFNα14 mRNA,IFNκ mRNA,IFNω1 mRNA,IFNε1 mRNA in PBMC of PE patients Were down-regulated (P ＜ 0.05 ).There was no significant difference in gene expression of type Ⅰ IFN receptors IFNαR1 and IFNαR2 between the PE and control groups (P ＞ 0.05 ).In comparison with the control group,mRNA expression of IFNγ gene was down-regulated ( P ＜ 0.05 ).The mRNA expression of IFNγR1 and IFNγR2 genes were upregulated compared with the control (P ＞ 0.05 ).Conclusion mRNA expression of type Ⅰ and type Ⅱ IFN in PE are significantly down-regulated,but not the IFN receptors.Reduced immune function may play an important role in the PE patients who are susceptible to virus,intracellular bacteria and parasites.

Objective To study the MR performances of finger joints with health subjects and rheumatoid arthritis (RA)patients,and to detect the imaging quality of a custom-made finger coil.Methods Finger coil,extremity coil,flexible surface coil and 3 inch surface coil were used to scan the self-made water phantom with similar T2 WI sequence,then the signal to noise ratio (SNR)on single image was measured for the comparison.The middle finger specimen (1 finger)was used for the research,5 healthy volunteers (8 fingers)and 18 RA patients (22 fingers)were also scanned.Results The SNR of finger coil was over 1.5 times higher than that of the 3 inch surface coil and 4 times higher than that of the extremity coil and flexible surface coil.For the 22 fingers with confirmed RA,synovitis was found in 1 7,joint effusion in 10,bone marrow edema in 5,bone erosion in 7 and tenosynovitis in 6.Conclusion The finger coil has higher SNR.